Aerodynamics and CFD analysis of equal size dual-rotor wind turbine

Sundararaju, Haripriya; Lo, King H.; Metcalfe, Ralph; Wang, Su Su

doi:10.1063/1.4999500

Title: Aerodynamics and CFD analysis of equal size dual-rotor wind turbine

Abstract

In this study, the linear momentum theory is used to analyze the power-extraction capability of dual-rotor wind turbines with equal-size rotors. The rotors of a dual-rotor wind turbine are modeled as two separate actuator disks. The stream tube encompassing the front rotor is modeled as two (inner and outer) stream tubes, with the rear rotor being fully enclosed within the front rotor inner stream tube. No assumption is made on airflow pressure in between the rotors. The effect of the front and rear rotor interaction on the airflow within the inner stream tube is included in the analysis. With the results obtained, axial thrusts on front and rear rotors are determined and later used as input for computational fluid dynamics simulation to determine flow characteristics across the rotors. Based on the flow pattern between the rotors, the total power coefficient of a dual-rotor wind turbine is related to the rotor separation distance. A general solution for the dual-rotor wind turbine is developed, which shows that the largest total power coefficient that can be obtained is 0.814, occurring at a rotor separation distance of 2.8 times the rotor diameter. Finally, the results of this study are compared with those obtained bymore »« less

Authors:

Sundararaju, Haripriya ^[1]; Lo, King H. ^[1]; Metcalfe, Ralph ^[1]; Wang, Su Su ^[1]

Univ. of Houston, TX (United States)

Publication Date:: Fri Aug 18 00:00:00 EDT 2017

Research Org.:: Univ. of Houston, TX (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

OSTI Identifier:: 1535340

Grant/Contract Number:: EE0000295

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Renewable and Sustainable Energy

Additional Journal Information:: Journal Volume: 9; Journal Issue: 4; Journal ID: ISSN 1941-7012

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; 17 WIND ENERGY

Citation Formats


                    Sundararaju, Haripriya, Lo, King H., Metcalfe, Ralph, and Wang, Su Su. Aerodynamics and CFD analysis of equal size dual-rotor wind turbine.  United States: N. p., 2017. 
Web.  doi:10.1063/1.4999500.

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                    Sundararaju, Haripriya, Lo, King H., Metcalfe, Ralph, & Wang, Su Su. Aerodynamics and CFD analysis of equal size dual-rotor wind turbine.  United States.  https://doi.org/10.1063/1.4999500

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                    Sundararaju, Haripriya, Lo, King H., Metcalfe, Ralph, and Wang, Su Su. Fri .  
"Aerodynamics and CFD analysis of equal size dual-rotor wind turbine".  United States.  https://doi.org/10.1063/1.4999500.  https://www.osti.gov/servlets/purl/1535340.

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@article{osti_1535340,

  title        = {Aerodynamics and CFD analysis of equal size dual-rotor wind turbine},

  author       = {Sundararaju, Haripriya and Lo, King H. and Metcalfe, Ralph and Wang, Su Su},

  abstractNote = {In this study, the linear momentum theory is used to analyze the power-extraction capability of dual-rotor wind turbines with equal-size rotors. The rotors of a dual-rotor wind turbine are modeled as two separate actuator disks. The stream tube encompassing the front rotor is modeled as two (inner and outer) stream tubes, with the rear rotor being fully enclosed within the front rotor inner stream tube. No assumption is made on airflow pressure in between the rotors. The effect of the front and rear rotor interaction on the airflow within the inner stream tube is included in the analysis. With the results obtained, axial thrusts on front and rear rotors are determined and later used as input for computational fluid dynamics simulation to determine flow characteristics across the rotors. Based on the flow pattern between the rotors, the total power coefficient of a dual-rotor wind turbine is related to the rotor separation distance. A general solution for the dual-rotor wind turbine is developed, which shows that the largest total power coefficient that can be obtained is 0.814, occurring at a rotor separation distance of 2.8 times the rotor diameter. Finally, the results of this study are compared with those obtained by similar studies reported in the literature. Discrepancies in the largest possible power coefficient of dual-rotor wind turbines reported in various investigations are examined and discussed.},

  doi          = {10.1063/1.4999500},

  journal      = {Journal of Renewable and Sustainable Energy},

  number       = 4,

  volume       = 9,

  place        = {United States},

  year         = {Fri Aug 18 00:00:00 EDT 2017},

  month        = {Fri Aug 18 00:00:00 EDT 2017}

}

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Works referenced in this record:

A Novel Dual-Rotor Turbine for Increased Wind Energy Capture
journal, June 2014

Rosenberg, A.; Selvaraj, S.; Sharma, A.
Journal of Physics: Conference Series, Vol. 524
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Hwang, Byeongho; Lee, Seungmin; Lee, Soogab
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Multiple actuator-disc theory for wind turbines
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Newman, B. G.
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Analysis of Counter-Rotating Wind Turbines
journal, June 2007

Shen, W. Z.; Zakkam, V. A. K.; Sørensen, J. N.
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DOI: 10.1088/1742-6596/75/1/012003

Analysis of aerodynamic characteristics on a counter-rotating wind turbine
journal, March 2010

Lee, Seungmin; Kim, Hogeon; Lee, Soogab
Current Applied Physics, Vol. 10, Issue 2
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Effects of design parameters on aerodynamic performance of a counter-rotating wind turbine
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Lee, Seungmin; Kim, Hogeon; Son, Eunkuk
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Aerodynamic performance prediction of a 30kW counter-rotating wind turbine system
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Similar Records

Title: Aerodynamics and CFD analysis of equal size dual-rotor wind turbine

Abstract

Citation Formats

A Novel Dual-Rotor Turbine for Increased Wind Energy Capture journal, June 2014

Optimization of a counter-rotating wind turbine using the blade element and momentum theory journal, September 2013

An experimental study of the two-staged wind turbines journal, September 1996

Multiple actuator-disc theory for wind turbines journal, October 1986

Analysis of Counter-Rotating Wind Turbines journal, June 2007

Analysis of aerodynamic characteristics on a counter-rotating wind turbine journal, March 2010

Effects of design parameters on aerodynamic performance of a counter-rotating wind turbine journal, June 2012

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journal, September 1996

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journal, June 2007

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journal, March 2010

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journal, June 2012

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